Method of making tire rims



E. H. WULFF. METHOD OF MAKING TIRE RIMS.

APPLICATION FILED SEPT- 8,192l.

Patented Dec. 5, 1922..

Emma,-

I YE N. T CIR.

may CQ'MUGWLJ own that i, W i Veiom eresideiii: eiecie, iii county oi? Thames and State ieve metie en inveiiiioii vE pperbein- 9 i e ziiocis Waking Tiee Rims; eiici so hereby ciecisire the foiio'wieg be ii 1i. iiescripiioe of she iniee, slice will eiieiiie others s iiiieci 510' which ii eppeiieiiis (so i. H

Ase s'mi same, reference being to the "ii"; drawings end is the Chili: ereiice meii ed iheieon, which iiiis specificeiioii.

invee b ieiei-es to the memiieciure eif semi 7 lee,

more accurate, rapid; and

pioyew in dance of sieei iii'e hoiciiiig s, ii eieict'fece empio 'eci Sofie? as i em we, tile memifsc'tueei orciecs sieei having e ceriioii which may very Within certain iimi'is, so one ioeich of sieei may be comsideieioiy herd-er mother, in forming the rims, sieei strips oi proper size see roiieci imo e ci rcie sine rim flanges formed thereon by the selling operation, end the eh i EIIMiS' then weiciedi together, Erie, however to verieiion in the eeriooii con 55cm tie steel, the rims ere mecie siigiiiziy iiiidei'sized; and eXpenciecien-d iiilfiil coil tmcieci. io execs size desired, iiiis iceiiig done so take she iife out of size metal. This expeiiciiieg mid coeimesing process causes she (no undergo sii'ein resulting conside'ceieie loss oi the rims Reese, due to check spiiiiizig end cracking of the metal. Neeeiy eii rims ere splits before being semi so'eeiomobiie memifecimees or users, and when split some will expand and some will coeiieos ciiie is she veryiiig simins present in meiei, end. which were not eliminated by she expending end coeiiecting process. Rims menufeciured by this method are also o em to tile ocjection that it is ciifiicuii to o min s Time which is of true circular form, due to flzhe warping action which takes place during the rolling operation. After the manufacture of all tire holding rims shey ere subjecieci to e rigidi inspection for true flanges end channels and circumferential,

messeremem. The iisgieetioe is esueiiy nee iiien hes heretofore been clone an American Ties isseciaiice anti if e iii L is to very pies m ss of an inch ciicumifei'eniei meesiiiemeii fa pins or? minus e vee seas feeciioii inch cicss-seciioiiei @Ofiiwil? iiiicowii out, Tiii is rigid inspeciioiri eesiiiss in e com sicierebie loss.

An object, of my i evoici the ebove oiijeciions, 'iJQ simpi' siici she cose of menuiieciure rims end to e1 ms ieige numb e1 of from the meihoci of empioyeci,

The invention is feily iieseiieeii in iile foTiowieg specificeiion, e ipeefeereci methoci of piece-icing the iiiusti'eiseci in she accompanying Wi.iCi1,-

Figiiire i is iiiusireewe m section roiling seep, i a is iii creative she session siempii step. 3 is View of compieice i'ize seeizioie, sis, is s, sec-iion e piece spiie iillfiil ii e compieie rim m iiim type made by my mes-0e, and F 5 is e sicie View of ibioe hingeciiy coimecieoi muiii eiesecizion ceiiepsibie rite coilspsed form.

sim is biiii'b up oi e p uy siempeoi segmeniei secfzions circiimferentisiiy aligned,

and iizcse sections, two or more of which ere prefers-i013; empioyeci, connecizeci iog'eeiies ei', iheii ends by "vi siding, hingeii joint-s, 01"

in any oiher suiceioie silencer, depending on the iype of sim desired,

practicing she invention, sirips of meiei i of the desiieci ieegiii end Widthio form the rim sections ere passeci between s set of bending soils :2 strip a bend approximating that of the completed rim section. The men's rim section is then pieced between a see of ciies 3 end acted on ihei'eby i0 shepe ii in she form of the rim section desired, boih as to cross-- to impart the 9 5 g l teness a rim of the collapsible multiple section tygxef.

ith this process the rim sections are rapidly and accurately formed with all parts thereof true, which cannot be accurately accomplished by the rolling process hertofore employed, thereby enabling the requisite number of rim sections to be built up or secureditogether either by welding hinged joints or otherwise to form a. rim which is true in all its dimensions and which is not open to the objection of having the ends thereof spring out in separated relation or spring in past each other in contracted relation, as is the case with rims made by the rolling methods heretofore employed and then split. It is evident that while I have illustrated the rim sections as being first rolled to give them the initial curvature, such curvature may be formed by stamping or in any other manner. It is found preferable in practice, however, to initially curve the rim section strips by rolling before stamping the same. It is also found that the rim sections when stamped do not possess strains which tend to spring the metal frem the shape in which it is stamped.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is,--

1. The method of making steel tire carrying rims, which consists in stamping strips of metal to form segmental rim sections of complete cross-sectional rim contour, and then joining the sections together end to end to form a complete rim.

2. The method of making steel tire carrying rims, which consists in stamping sheet metal strips to form a plurality of segmental rim sections of complete rim form in cross-sectional contour, and then assembling the sections in rim form and joining the meeting ends of the sections to form a collapsible rim.

3. The method of making steel tire carrying rims, which consists in rolling strips of metal to impart a predetermined curvature thereto, then stamping the curved strips to form segmental rim sections of complete cross-sectional rim contour, and then joining the sections together end to end to form a complete rim.

In testimony whereof I have hereunto signed my name to this specification.

EZRA. H. WULFF. 

